Massage office chair

Abstract

The invention relates to the technical field of massage office chairs, and discloses a massage office chair which comprises a cushion, a chair back and a massage machine core. The chair back is composed of a back frame, a front supporting piece and a rear supporting piece, wherein the front supporting piece is made of a flexible material so as to fit the curve of the back of a human body. A flexible massage module is innovatively arranged between a front supporting piece and a rear supporting piece and comprises a left flexible rack, a right flexible rack and a conductive strip, and tooth-shaped structures meshed with a massage machine core are arranged on the surfaces of the racks. The massage machine core is in contact with the conductive strips through the elastic contacts to take electricity and moves along a dynamic track formed by the flexible racks, and multi-area massage from the caudal vertebra to the head is achieved. And the movement can be hidden behind the cushion when not working, so that foreign body sensation is eliminated. The structure adapts to different body types through cooperative deformation of the flexible component, the hollowed-out protrusion design of the back frame provides a deformation space for the module, and the fitting degree is enhanced through elastic deformation of the rear supporting piece. A built-in storage battery is used for supplying power, and cable constraint is avoided.

Description

Technical Field

[0001] This invention relates to the field of massage office chair technology, and specifically to a massage office chair. Background Technology

[0002] Office workers often sit for long periods, leading to fatigue in their lower back muscles, intervertebral discs, and neck and shoulder muscles, which can negatively impact their health over time. Office chairs with massage functions can effectively alleviate this fatigue. Traditional massage chairs are typically bulky, with fixed massage mechanisms that struggle to adapt to the different back curves of users, resulting in a less ergonomic massage. When massage functions are integrated into office chairs, the massage mechanism or related components are often fixed inside the chair back, which can create a feeling of discomfort on the user's back when not using a massage function, affecting daily comfort. Furthermore, some office chairs with integrated massage functions often use preset, fixed massage paths, failing to adapt to the individual needs of users of different heights and body types, thus limiting the comfort and effectiveness of the massage.

[0003] Office chairs with massage functions on the market typically only offer spot massage, providing localized fatigue relief. While the office massage chair shown in utility model patent document CN219699454U features a walking function and can provide full-back massage, the guide rails in this design can negatively impact back comfort when not performing a massage.

[0004] Therefore, massage office chairs often fail to adapt to the back curves of different users during massage, resulting in a decrease in massage effect; at the same time, the presence of the massage mechanism can easily cause a foreign body sensation during non-massage periods, affecting comfort. Summary of the Invention

[0005] This invention provides a massage office chair to solve the problems that massage office chairs cannot adapt to the different back curves of the human body and that the human body has a foreign body sensation on the back during non-massage periods, which affects comfort.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0007] In a first aspect, a massage office chair includes a seat cushion, a backrest, and a massage mechanism. An electrical control box is fixed under the seat cushion. The backrest includes a back frame fixed to one end of the seat cushion. A rear support is fixed to the inside of the back frame or integrally formed with the back frame. A front support is connected to the side of the back frame near the seat cushion. The chair also includes: acquiring pressure distribution data of the user's back through the electrical control box and generating a human back curve model based on the pressure distribution data.

[0008] A massage module is provided between the front support member and the rear support member;

[0009] The massage module is made of flexible material;

[0010] The massage module includes a right flexible toothed bar and a left flexible toothed bar, which can deform according to the curve of the human back to adapt to different human body differences;

[0011] The massage mechanism is movably connected to the massage module so that it runs along the curve of the human back during the massage period, while the human back does not feel any foreign object during the non-massage period.

[0012] A miniature drive unit, connected to a right flexible rack and a left flexible rack, includes:

[0013] The servo motor is fixed to the upper and lower crossbeams by bolts.

[0014] The main gear is connected to the output shaft of the servo motor;

[0015] The gear has two parts, which are rotatably connected to the upper and lower crossbeams respectively via bearings;

[0016] The push rod is eccentrically hinged at one end to the driven gear, and connected at the other end to the key nodes of the right and left flexible racks via a ball joint;

[0017] A miniature Hall displacement sensor is installed at the key node. The probe of the miniature Hall displacement sensor is aligned with the right and left flexible racks and electrically connected to the control box to provide real-time feedback on the deformation displacement of the right and left flexible racks. This allows the control box to control the deformation of the right and left flexible racks of the massage module according to the human back curve model, so as to adapt to the user's back curve.

[0018] Furthermore, the back frame is the load-bearing frame of the chair back. The side of the back frame near the seat cushion has a curved structure that conforms to the human back, and the middle part is hollow or protruding in a direction away from the seat cushion to avoid interfering with the rear support.

[0019] The front support is made of a flexible material to support the human back and adapt to the human body shape by deforming under force.

[0020] Furthermore, the massage module includes:

[0021] The upper crossbeam is fixed to the inner wall of the back frame and is close to the upper end of the back frame;

[0022] The lower crossbeam is fixed to the inner wall of the back frame, close to the lower end of the back frame, and away from the seat cushion;

[0023] The upper ends of the right flexible rack and the left flexible rack are connected to the upper crossbeam, and the lower ends are connected to the lower crossbeam. There is a gap between the right flexible rack and the left flexible rack to allow the massage mechanism to move.

[0024] The right and left conductive strips are connected at one end to the upper crossbeam and at the other end to the lower crossbeam, and are respectively connected to the outer side of the right flexible rack and the left flexible rack.

[0025] The right flexible rack, left flexible rack, right conductive strip, and left conductive strip are flexible structural components that deform synchronously with the deformation of the front support component;

[0026] A miniature drive unit, connected to a right flexible rack and a left flexible rack, includes:

[0027] The servo motor is fixed to the upper and lower crossbeams by bolts.

[0028] The main gear is connected to the output shaft of the servo motor;

[0029] The gear has two parts, which are rotatably connected to the upper and lower crossbeams respectively via bearings;

[0030] The push rod is eccentrically hinged at one end to the driven gear, and connected at the other end to the key nodes of the right and left flexible racks via a ball joint;

[0031] A miniature Hall displacement sensor is installed at the key node. The probe of the miniature Hall displacement sensor is aligned with the right flexible rack and the left flexible rack and is electrically connected to the control box to provide real-time feedback on the deformation displacement of the right flexible rack and the left flexible rack.

[0032] Furthermore, the rear support member is made of a flexible or elastic material so that it deforms together with the massage module and the front support member and provides support to the massage module.

[0033] Furthermore, the right flexible toothed rack, left flexible toothed rack, right conductive strip and left conductive strip have the same curved shape as the back frame, and the adjacent surfaces of the right flexible toothed rack and left flexible toothed rack have tooth shape to engage with the massage mechanism, so that the massage mechanism can follow the tooth shape to move up and down to cover the massage area to the entire back of the human body.

[0034] Furthermore, the side of the massage mechanism near the right and left conductive strips is electrically connected to an elastic contact.

[0035] The elastic contact makes conductive contact with the right and left conductive strips to provide operating power to the massage mechanism.

[0036] Furthermore, a left armrest and a right armrest are respectively connected to both sides of the back frame. A hand controller is fixed to one side of the seat cushion. An electrical control box is fixed to the bottom of the seat cushion, and the electrical control box is electrically connected to the hand controller, the right conductive strip, and the left conductive strip. A leg rest is connected to the bottom of the seat cushion by flipping it over. A gas spring is rotatably connected to the middle of the bottom of the seat cushion. A five-star foot is connected to the end of the gas spring away from the seat cushion. Multiple casters are rotatably connected to the lower end of the five-star foot.

[0037] Furthermore, the lower ends of the right flexible toothed rack and the left flexible toothed rack extend away from the seat cushion and closer to the lower end of the back frame, so as to store the massage mechanism between the seat cushion and the back frame, avoiding the back area of ​​the human body, during non-massage periods.

[0038] The electrical control box is equipped with a storage battery to work with the right and left conductive strips to prevent the wires from being pulled during the massage period;

[0039] The massage mechanism includes:

[0040] The housing is positioned between the left and right flexible racks; guide sleeves are symmetrically fixed on both sides of the housing and fit over the outer sides of the left and right flexible racks, the left conductive strip, and the right conductive strip; a dual-head motor is fixed inside the housing, located in the center, and electrically connected to the elastic contacts; a worm gear is fixed to the two drive ends of the dual-head motor; a turbine is rotatably mounted inside the housing, symmetrically distributed, and meshes with the worm gear; a first gear is coaxially fixed on the turbine near the front support; a second gear is rotatably mounted inside the housing, symmetrically distributed, and meshes with the first gear; a third gear is rotatably mounted on... The inner side of the housing is symmetrically distributed and meshes with the second gear; the rotating rod is axially arranged through the third gear and rotatably passes through the housing near the front support; the massage head is fixed to one end of the rotating rod and located in the housing near the front support; the transmission gear is coaxially fixed to the side of the third gear away from the front support; the follower gear is rotatably arranged inside the housing, symmetrically distributed, and meshes with the transmission gear; the travel gear is coaxially fixed to the end face of the follower gear, movably passes through the housing, and is located inside the guide sleeve, meshing with the flexible rack and the left flexible rack; the elastic contact is located between the guide sleeve and the housing.

[0041] Secondly, a method for controlling a massage office chair, the method comprising:

[0042] The electronic control box acquires pressure distribution data on the user's back and generates a human back curve model based on the pressure distribution data.

[0043] The electric control box controls the deformation of the right and left flexible toothed racks of the massage module according to the curve model of the human back, so as to adapt to the curve of the user's back.

[0044] The electronic control box acquires the user's physiological state data and selects a massage mode based on the physiological state data;

[0045] Based on the selected massage mode and the human back curve model, the massage mechanism is controlled to move along the right flexible rack and the left flexible rack, while the massage head of the massage mechanism is controlled to work.

[0046] During the movement of the massage mechanism, the movement speed and massage intensity are dynamically adjusted based on the human back curve model and pressure distribution data.

[0047] After the massage ends, control the massage mechanism to return to its stored position during non-massage periods.

[0048] Furthermore, the system acquires pressure distribution data of the user's back through an electronic control box, and generates a human back curve model based on the pressure distribution data, including:

[0049] By using miniature Hall displacement sensors located at key points, pressure distribution data is collected when the user's back comes into contact with the chair back.

[0050] The collected pressure data is filtered and denoised to obtain an effective pressure distribution map of the user's back.

[0051] Based on the effective pressure distribution map, identify the user's spinal alignment and back muscle group distribution characteristics;

[0052] Based on the identified spinal alignment and muscle group distribution features, a three-dimensional curve mathematical model that conforms to the individual user's back shape is calculated and generated.

[0053] The three-dimensional curve mathematical model is converted into control parameters for the massage module, which are used to guide the electrical control box in controlling the deformation of the right and left flexible racks. Attached Figure Description

[0054] Figure 1 A perspective view of the massage office chair provided in an embodiment of the present invention;

[0055] Figure 2 A perspective view of the massage mechanism during non-massage periods provided in an embodiment of the present invention;

[0056] Figure 3 A perspective view of the massage mechanism during the massage period provided in an embodiment of the present invention;

[0057] Figure 4 An exploded perspective view of the chair back provided in an embodiment of the present invention;

[0058] Figure 5 This is an exploded three-dimensional view of the massage office chair provided in an embodiment of the present invention.

[0059] Figure 6 A perspective view of the massage module and massage mechanism assembly provided in an embodiment of the present invention;

[0060] Figure 7 A perspective view of the massage mechanism provided in an embodiment of the present invention;

[0061] Figure 8A three-dimensional schematic diagram of the massage mechanism and walking gear assembly provided in an embodiment of the present invention;

[0062] Figure 9 A perspective view of the combination of a dual-head motor, a first gear, a second gear, a third gear, a follower gear, and a traveling gear provided in an embodiment of the present invention;

[0063] Figure 10 A plan view of the combination of a dual-head motor, a first gear, a second gear, a third gear, a follower gear, and a traveling gear provided in an embodiment of the present invention.

[0064] Explanation of reference numerals in the attached figures:

[0065] In the diagram: 1. Chair back; 1-1. Back frame; 1-2. Rear support; 1-3. Massage module; 1-4. Front support; 2. Right armrest; 3. Left armrest; 4. Seat cushion; 5. Hand controller; 6. Electrical control box; 7. Chassis; 8. Leg rest; 9. Gas spring; 10. Five-star base; 11. Casters; 12. Servo motor; 13. Main gear; 14. Slave gear; 15. Push rod; 1-3-1. Upper crossbeam; 1-3-2. Right flexible rack; 1-3-3. Right conductive strip; 1-3-4. Left flexible rack; 1-3-5. Left conductive strip; 1-3-6. Massage mechanism; 1-3-7, lower crossbeam; 1-3-6-1, housing; 1-3-6-2, guide sleeve; 1-3-6-3, dual-head motor; 1-3-6-4, worm gear; 1-3-6-5, turbine; 1-3-6-6, first gear; 1-3-6-7, second gear; 1-3-6-8, third gear; 1-3-6-9, rotating rod; 1-3-6-10, massage head; 1-3-6-11, follow-up gear; 1-3-6-12, traveling gear; 1-3-6-13, elastic contact; 1-3-6-14, transmission gear. Detailed Implementation

[0066] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0067] like Figures 1 to 10As shown, an embodiment of the present invention provides a massage office chair, including a seat cushion 4, a backrest 1, and a massage mechanism 1-3-6. An electrical control box 6 is fixed below the seat cushion 4. The backrest 1 includes a back frame 1-1 fixed to one end of the seat cushion 4 and a rear support 1-2 fixed to the inside of the back frame 1-1 or integrally formed with the back frame 1-1. A front support 1-4 is connected to the side of the back frame 1-1 near the seat cushion 4. The invention also includes: acquiring user back pressure distribution data through the electrical control box 6 and generating a human back curve model based on the pressure distribution data.

[0068] A massage module 1-3 is provided between the front support member 1-4 and the rear support member 1-2;

[0069] Massage modules 1-3 are made of flexible material;

[0070] The massage module 1-3 includes a right flexible toothed bar 1-3-2 and a left flexible toothed bar 1-3-4. The right flexible toothed bar 1-3-2 and the left flexible toothed bar 1-3-4 can deform according to the curve of the human back to adapt to different human body differences.

[0071] The massage mechanism 1-3-6 is movably connected to the massage module 1-3 so that it runs along the curve of the human back during the massage period, while the human back does not feel any foreign object during the non-massage period.

[0072] Specifically, the seat cushion 4 provides support for the back frame 1-1 that makes up the backrest 1. The back frame 1-1 can stably support the rear support 1-2 and the front support 1-4. The front support 1-4 can provide support for the human back. As a support for the human back, the front support 1-4 is made of flexible material. When the human back leans against it, it can adapt to the shape of the human body and deform appropriately, improving back comfort. The rear support 1-2 can deform with the massage module 1-3 and the front support 1-4 when the person leans against the backrest 1 for massage. At the same time, it can also provide appropriate support for the massage module 1-3.

[0073] In practical application, the user can sit on the seat cushion 4 and rest their back naturally against the backrest 1, so that the back frame 1-1 in the backrest 1 can support the front support 1-4 to contact the user's back, so that the front support 1-4 can provide support for the user's back. At this time, the massage mechanism 1-3-6 is in a non-massage state and is stored in the seat cushion 4 near the back frame 1-1.

[0074] As a preferred embodiment of the present invention, the back frame 1-1 is the force-bearing frame of the chair back 1. The side of the back frame 1-1 near the seat cushion 4 is a curved structure that conforms to the back of the human body, and the middle part is hollow or protruding in a direction away from the seat cushion 4 to avoid interfering with the back support 1-2.

[0075] The front support components 1-4 are made of flexible material to support the human back and adapt to the human body shape by deforming under force.

[0076] Specifically, the seat cushion 4 provides stable support for the back frame 1-1, enabling the back frame 1-1 to withstand the weight of the human body and form the main support force of the chair back 1. The space protruding from the back frame 1-1 away from the seat cushion 4 provides space for the rear support 1-2 and the massage module 1-3 to be set and moved, and also provides support. The front support 1-4 can deform under the pressure of the human back and conform to the user's back using its own curve. When the external force is removed, it will rebound and return to its original position.

[0077] Massage modules 1-3 include:

[0078] The upper crossbeam 1-3-1 is fixed to the inner wall of the back frame 1-1 and is close to the upper end of the back frame 1-1;

[0079] The lower crossbeam 1-3-7 is fixed to the inner wall of the back frame 1-1, close to the lower end of the back frame 1-1, and away from the seat cushion 4;

[0080] The upper ends of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 are connected to the upper crossbeam 1-3-1, and the lower ends are connected to the lower crossbeam 1-3-7. There is a gap between the right flexible rack 1-3-2 and the left flexible rack 1-3-4 to allow the massage mechanism 1-3-6 to move.

[0081] The right conductive strip 1-3-3 and the left conductive strip 1-3-5 are connected at one end to the upper crossbeam 1-3-1 and at the other end to the lower crossbeam 1-3-7, and are respectively connected to the outer side of the right flexible rack 1-3-2 and the left flexible rack 1-3-4.

[0082] The right flexible rack 1-3-2, the left flexible rack 1-3-4, the right conductive strip 1-3-3, and the left conductive strip 1-3-5 are flexible structural components that deform synchronously with the deformation of the front support 1-4.

[0083] A miniature drive unit, connected to a right flexible rack and a left flexible rack, includes:

[0084] Servo motor 12 is fixed to the upper crossbeam 1-3-1 and the lower crossbeam 1-3-7 by bolts;

[0085] The main gear 13 is connected to the output shaft of the servo motor 12;

[0086] Gear 14 has two gears, which are rotatably connected to the upper crossbeam 1-3-1 and the lower crossbeam 1-3-7 respectively via bearings;

[0087] The push rod 15 is eccentrically hinged at one end to the driven gear 14, and the other end is connected to the key nodes of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 through a ball joint;

[0088] A miniature Hall displacement sensor is installed at the key node. The probe of the miniature Hall displacement sensor is aligned with the right flexible rack 1-3-2 and the left flexible rack 1-3-4 and is electrically connected to the electronic control box 6 to provide real-time feedback on the deformation displacement of the right flexible rack 1-3-2 and the left flexible rack 1-3-4. This allows the electronic control box 6 to control the deformation of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 of the massage module according to the human back curve model, so as to adapt to the user's back curve.

[0089] The key nodes of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 are set at 8.5cm every 8.5cm along the height of the chair back 1, for a total of 8 nodes, corresponding to the neck, upper back, middle back and waist areas respectively. The electric control box 6 has a built-in deformation control algorithm. According to the target deformation value of each node in the human back curve model, the servo motor 12 is driven in the order of waist first, then back, and then neck to avoid rack deformation interference. The deformation difference between adjacent nodes does not exceed 2mm, ensuring that the overall curve of the rack is smooth and the curvature change rate is ≤0.05 / mm, which is adapted to the physiological curve of the human back. The eccentricity of the eccentric hinge between the gear 14 and the push rod 15 is 5mm. The push rod 15 can be moved 10mm for every revolution of the gear 14.

[0090] Specifically, the direct measurement object of the miniature Hall displacement sensor is the deformation displacement of the right flexible rack 1-3-2 and the left flexible rack 1-3-4. The deformation displacement of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 is the physical result of the pressure on the user's back. The two are quantitatively related through mechanical stiffness or elastic coefficient, which conforms to the core logic of Hooke's Law. Within the elastic deformation range, the force is proportional to the deformation.

[0091] The basic formula for the relationship between pressure and displacement within the elastic deformation range of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 is as follows:

[0092] in, This indicates the pressure exerted by the user's back on the right flexible rack 1-3-2 and the left flexible rack 1-3-4; The value represents the deformation displacement of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 collected by the miniature Hall displacement sensor; K represents the combined stiffness coefficient of the right flexible rack 1-3-2 and the left flexible rack 1-3-4.

[0093] Specifically, when the control box 6 sends a deformation command, the servo motor 12 outputs the corresponding torque according to the command, driving the drive wheel 13 to rotate; the main gear 13 drives the driven gear 14 to rotate through meshing, and the driven gear 14 uses an eccentric hinge to convert the rotational motion into linear reciprocating motion on the push rod 15. The push rod 15 applies directional thrust to the key nodes of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 through a ball joint. At the same time, the rear support 1-2 generates a reverse support force under the rack compression to avoid excessive rack deformation. The miniature Hall displacement sensor monitors the rack deformation progress in real time. When the error between the actual displacement and the target displacement is detected to be <1mm, the control box 6 sends a stop command, the servo motor 12 stops running, and the directional deformation of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 is completed.

[0094] The back frame 1-1 can stably support the upper crossbeam 1-3-1 and the lower crossbeam 1-3-7. The upper crossbeam 1-3-1 and the lower crossbeam 1-3-7 can provide stable support for the right flexible rack 1-3-2 and the left flexible rack 1-3-4. The right flexible rack 1-3-2 can provide support for the right conductive strip 1-3-3, and the left flexible rack 1-3-4 can provide support for the left conductive strip 1-3-5. The right conductive strip 1-3-3 and the left conductive strip 1-3-5 can conduct current. Moreover, the right conductive strip 1-3-3, the left conductive strip 1-3-5, the right flexible rack 1-3-2, and the left flexible rack 1-3-4 are flexible structural components that can deform according to the downward pressure of the front support 1-4.

[0095] The rear support 1-2 is made of a flexible or elastic material so that it deforms together with the massage module 1-3 and the front support 1-4 and provides support to the massage module 1-3.

[0096] In practical application, when a user leans against the front support 1-4, causing it to deform, the front support 1-4 will simultaneously deform and use external force to contact the right conductive strip 1-3-3, left conductive strip 1-3-5, right flexible rack 1-3-2, and left flexible rack 1-3-4. Furthermore, under the support of the upper crossbeam 1-3-1 and lower crossbeam 1-3-7, the external force will push the right conductive strip 1-3-3, left conductive strip 1-3-5, right flexible rack 1-3-2, and left flexible rack 1-3-4 to deform together. The deformation allows the right conductive strip 1-3-3, left conductive strip 1-3-5, right flexible rack 1-3-2, and left flexible rack 1-3-4 to form a curved shape similar to the curve of the user's back. At the same time, the right flexible rack 1-3-2 and left flexible rack 1-3-4 can contact the rear support 1-2 and push the rear support 1-2 to deform together, so that the rear support 1-2 can use its elasticity to provide support for the left flexible rack 1-3-4 and right flexible rack 1-3-2, thereby making the backrest fit better.

[0097] In a preferred embodiment of the present invention, the right flexible toothed bar 1-3-2, the left flexible toothed bar 1-3-4, the right conductive bar 1-3-3, and the left conductive bar 1-3-5 have the same curved shape as the back frame 1-1. The adjacent surfaces of the right flexible toothed bar 1-3-2 and the left flexible toothed bar 1-3-4 have toothed shapes to engage with the massage mechanism 1-3-6, so that the massage mechanism 1-3-6 can follow the toothed shapes to move up and down to cover the massage area to the entire back of the human body.

[0098] Specifically, the right flexible rack 1-3-2 and the left flexible rack 1-3-4 can use their tooth shape to cooperate with the traveling gear 1-3-6-12 to provide support, movement trajectory and guidance for the massage mechanism 1-3-6. The movement trajectory provided by the right flexible rack 1-3-2 and the left flexible rack 1-3-4 for the massage mechanism 1-3-6 is the curve of the human body, which can perform massage from the coccyx, waist, back, neck and even the head.

[0099] The side of the massage mechanism 1-3-6 near the right conductive strip 1-3-3 and the left conductive strip 1-3-5 is electrically connected to a flexible contact 1-3-6-13;

[0100] The flexible contact 1-3-6-13 makes conductive contact with the right conductive strip 1-3-3 and the left conductive strip 1-3-5 to provide operating power to the massage mechanism 1-3-6.

[0101] Specifically, the massage mechanism 1-3-6 provides stable support for the elastic contact 1-3-6-13, which in turn conducts electricity to the dual-head motor 1-3-6-3.

[0102] The lower ends of the right flexible toothed bar 1-3-2 and the left flexible toothed bar 1-3-4 extend away from the seat cushion 4 and closer to the lower end of the back frame 1-1, so as to store the massage mechanism 1-3-6 between the seat cushion 4 and the back frame 1-1, avoiding the back area of ​​the human body, during non-massage periods.

[0103] In practical application, the lower ends of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 extend to the rear of the seat cushion 4, allowing the massage mechanism 1-3-6 to be stored behind the seat cushion 4 during non-massage periods, thus avoiding the backrest area and improving comfort during non-massage periods. After the user sits on the seat cushion 4 and leans against the front support 1-4, the massage mechanism 1-3-6 can be activated through the conductive interaction between the right conductive strip 1-3-3 and the left conductive strip 1-3-5 and the elastic contact 1-3-6-13. This allows the massage mechanism 1-3-6 to utilize the interaction with the right flexible rack... The meshing action of the teeth of 1-3-2 and the left flexible rack 1-3-4 drives the elastic contact 1-3-6-13 to move at a constant speed along the right flexible rack 1-3-2 and the left flexible rack 1-3-4 from the position near the lower crossbeam 1-3-7 to the position near the upper crossbeam 1-3-1. At the same time, the elastic contact 1-3-6-13 will remain in contact with the right conductive strip 1-3-3 and the left conductive strip 1-3-5 during the movement to conduct electricity, so that the massage mechanism 1-3-6 can massage the body along the curve of the human body, from the tailbone, waist, back, neck and even the head.

[0104] In a preferred embodiment of the present invention, a left armrest 3 and a right armrest 2 are respectively connected to both sides of the back frame 1-1. A hand controller 5 is fixed to one side of the seat cushion 4. An electric control box 6 is fixed to the bottom of the seat cushion 4. The electric control box 6 is electrically connected to the hand controller 5, the right conductive strip 1-3-3 and the left conductive strip 1-3-5. A leg rest 8 is flipped and connected to the bottom of the seat cushion 4. A gas spring 9 is rotatably connected to the middle of the bottom of the seat cushion 4. A five-star foot 10 is connected to the end of the gas spring 9 away from the seat cushion 4. Multiple casters 11 are rotatably connected to the lower end of the five-star foot 10. A chassis 7 is installed on the outer side of the gas spring 9.

[0105] Specifically, the seat cushion 4 provides stable support for the hand controller 5 and the electrical control box 6. The hand controller 5 can control the power supply of the electrical control box 6 under the operation of the operator. The five-star base 10 provides rotational support for the casters 11 and can cooperate with the casters 11 to provide support for the gas spring 9. The gas spring 9 provides rotational support for the seat cushion 4, allowing the seat cushion 4 to rotate around the gas spring 9 as the center under the action of external force. The seat cushion 4 provides support for the leg rest 8. The leg rest 8 flips out from under the seat cushion 4 to facilitate the user's leg support. The back frame 1-1 provides stable support for the left armrest 3 and the right armrest 2. The left armrest 3 and the right armrest 2 provide support for the user's arms.

[0106] The electrical control box 6 is equipped with a battery to work with the right conductive strip 1-3-3 and the left conductive strip 1-3-5 to prevent the wires from being pulled during the massage period.

[0107] Specifically, the electrical control box 6 provides stable support and protection for the battery, and the hand controller 5 can control the battery to supply power to the right conductive strip 1-3-3 and the left conductive strip 1-3-5 under the operation of the operator, so that the massage mechanism 1-3-6 can obtain operating power and drive the massage mechanism 1-3-6 to perform massage work, so that the power cord will not be pulled during the massage period.

[0108] In practical application, the user can push the backrest 1 or seat cushion 4 as needed, so that external force can be transmitted to the gas spring 9. The gas spring 9 drives the five-star base 10, which in turn transmits the external force to the casters 11. The casters 11 can roll under the action of external force using friction with the ground. At the same time, depending on the direction of the applied external force, they rotate under the support of the five-star base 10, thus moving the office chair to a suitable position. The user can sit on the seat cushion 4 and use their legs, hips, and waist to rotate the seat cushion 4, so that the seat cushion 4 can rotate under the support of the gas spring 9. At the same time, the seat cushion 4 will drive the backrest 1 to rotate and adjust the angle. When the user needs to massage their back, they can operate the hand controller 5 to start the massage mechanism 1-3-6. The staff can operate the base 7 to control the extension and retraction of the gas spring 9 to adjust the height of the seat cushion 4 and the backrest 1.

[0109] In a preferred embodiment of the present invention, the massage mechanism 1-3-6 includes: a housing 1-3-6-1, disposed between the left and right flexible racks; a guide sleeve 1-3-6-2, symmetrically fixed on both sides of the housing 1-3-6-1, and sleeved on the outside of the left flexible rack, the right flexible rack, the left conductive strip 1-3-5, and the right conductive strip 1-3-3; a dual-head motor 1-3-6-3, fixed inside the housing 1-3-6-1, located in the center, and electrically connected to the elastic contact 1-3-6-13; and a worm gear 1-3-6- 4. Fixed on both drive ends of the dual-head motor 1-3-6-3; turbine 1-3-6-5, rotatably mounted on the inner side of housing 1-3-6-1, symmetrically distributed, and meshing with worm 1-3-6-4; first gear 1-3-6-6, coaxially fixed on the side of turbine 1-3-6-5 near the front support 1-4; second gear 1-3-6-7, rotatably mounted on the inner side of housing 1-3-6-1, symmetrically distributed, and meshing with first gear 1-3-6-6; third gear 1-3-6-8, rotatably mounted on the housing The inner side of gear 1-3-6-1 is symmetrically distributed and meshes with the second gear 1-3-6-7; the rotating rod 1-3-6-9 is axially arranged through the third gear 1-3-6-8 and rotates through the side of the housing 1-3-6-1 near the front support member 1-4; the massage head 1-3-6-10 is fixed to one end of the rotating rod 1-3-6-9 and is located in the housing 1-3-6-1 near the front support member 1-4; the transmission gear 1-3-6-14 is coaxially fixed to the third gear 1-3-6-8 away from the front support member 1-4. One side; the follower gear 1-3-6-11 is rotatably mounted inside the housing 1-3-6-1 and symmetrically distributed, meshing with the transmission gear 1-3-6-14; the travel gear 1-3-6-12 is coaxially fixed to the end face of the follower gear 1-3-6-11, and moves through the housing 1-3-6-1, located inside the guide sleeve 1-3-6-2, meshing with the right flexible rack 1-3-2 and the left flexible rack 1-3-4; the elastic contact 1-3-6-13 is located between the guide sleeve 1-3-6-2 and the housing 1-3-6-1.

[0110] Specifically, the housing 1-3-6-1 provides stable support for the guide sleeve 1-3-6-2, and provides a through channel and rotational support for the rotating rod 1-3-6-9. It also provides a through channel and rotational space for the traveling gear 1-3-6-12, and provides stable support for the dual-head motor 1-3-6-3. Furthermore, it provides rotational support for the turbine 1-3-6-5, the second gear 1-3-6-7, and the follower gear 1-3-6-11. The rotating rod 1-3-6-9 provides support for the second gear 1-3-6-7. -3-6-7 provides stable support for the transmission gear 1-3-6-14, the follower gear 1-3-6-11 provides stable support for the travel gear 1-3-6-12, the turbine 1-3-6-5 provides stable support for the first gear 1-3-6-6, and the guide sleeve 1-3-6-2 provides positioning and guiding for the housing 1-3-6-1, so that the housing 1-3-6-1 can move along the trajectory of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 under the drive of the travel gear 1-3-6-12 and in cooperation with the guide sleeve 1-3-6-2.

[0111] In practical application, when the user operates the hand controller 5 to supply power to the right conductive bar 1-3-3 and the left conductive bar 1-3-5 by the battery, the current is transmitted to the dual-head motor 1-3-6-3 through the elastic contact 1-3-6-13, enabling the dual-head motor 1-3-6-3 to obtain operating power and start running. The dual-head motor 1-3-6-3 then drives the worm gear 1-3-6-4 to rotate via its drive end, and the worm gear 1-3-6-4 uses its rotational power to drive the turbine 1-3-6-5. Supported by housing 1-3-6-1, the turbine 1-3-6-5 rotates, simultaneously driving the first gear 1-3-6-6 to rotate as well. This allows the first gear 1-3-6-6 to use its rotational power and meshing action to drive the second gear 1-3-6-7 to rotate, also supported by housing 1-3-6-1. The second gear 1-3-6-7, in turn, uses its rotational power and meshing action to drive the third gear 1-3-6-8 to rotate. Simultaneously, the third gear 1-3-6-8 drives the rotating rod 1-3-6-9... Supported by the housing 1-3-6-1, the rotating rod 1-3-6-9 drives the massage head 1-3-6-10 and the transmission gear 1-3-6-14 to rotate together. This allows the massage head 1-3-6-10 to use its rotational power to massage the user's back through the front support 1-4. Simultaneously, the transmission gear 1-3-6-14, driven by the rotating rod 1-3-6-9, uses its rotational power and meshing action to push the follower gear 1-3-6-11 within the housing 1-3-6-1. Supported by 6-1, the follower gear 1-3-6-11 rotates, causing the travel gear 1-3-6-12 to rotate together. This allows the travel gear 1-3-6-12 to use its rotational power and the meshing action of its teeth with the right flexible rack 1-3-2 and the left flexible rack 1-3-4 to move along the right flexible rack 1-3-2 and the left flexible rack 1-3-4, thus providing a massage to the user's back along the trajectory of the right flexible rack 1-3-2 and the left flexible rack 1-3-4.

[0112] A method for controlling a massage office chair, the method comprising:

[0113] Step 1: Acquire pressure distribution data of the user's back through the electronic control box 6, and generate a human back curve model based on the pressure distribution data, including:

[0114] Step 11: Using miniature Hall effect displacement sensors installed inside the front support 1-4, pressure distribution data is collected when the user's back contacts the chair back 1. Specifically, miniature Hall effect displacement sensors are installed at key nodes of the right flexible rack 1-3-2 and the left flexible rack 1-3-4. When the user sits on the seat cushion 4 and naturally leans their back against the front support 1-4, the miniature Hall effect displacement sensors immediately activate, continuously collecting pressure data applied to the user's back (including the pressure magnitude at each miniature Hall effect displacement sensor location). The collection time is maintained for approximately 3 seconds (ensuring the pressure state under a stable sitting posture is captured). The collected raw data is transmitted in real-time to the electrical control box 6 under the chair seat via wires, while simultaneously recording the specific position (such as height and left / right orientation) of each miniature Hall effect displacement sensor on the chair back 1, providing positional reference for subsequent analysis.

[0115] Step 12 involves filtering and denoising the collected pressure data to obtain an effective pressure distribution map of the user's back. This includes removing abnormal data, such as sudden high-pressure values ​​(significantly higher than the normal pressure range) caused by a user's instantaneous adjustment of posture, retaining only pressure data under stable conditions. Then, the remaining data is smoothed by continuously calculating the average pressure over multiple adjacent moments to reduce minor fluctuations (such as slight errors in the sensor itself), making pressure changes more stable. For a few missing data points that may be due to poor contact of the miniature Hall displacement sensor, the pressure values ​​of nearby normal miniature Hall displacement sensors are used to estimate and supplement the missing data, ensuring the continuity of pressure data across the entire back area. Finally, the processed pressure data is converted into a visual pressure distribution map, where different areas are colored or brighter to correspond to pressure levels (higher pressure corresponds to darker or brighter colors), clearly showing the pressure distribution across different parts of the user's back.

[0116] Step 13: Based on the effective pressure distribution map, identify the user's spinal alignment and back muscle group distribution characteristics. Specifically, this includes: identifying areas with high pressure from the pressure distribution map. These areas correspond to back muscle groups (such as the left and right latissimus dorsi muscles, erector spinae muscles of the lumbar region, etc.). By dividing the boundaries of different high-pressure areas, mark the distribution range and location of each major muscle group, providing key features for subsequent modeling.

[0117] Step 14: Based on the identified muscle group distribution characteristics, calculate and generate a three-dimensional curve mathematical model that conforms to the user's individual back shape. Specifically, this includes: establishing a three-dimensional coordinate system with the connection point between the seat and backrest 1 as the reference point (height direction is vertical upward from backrest 1, left and right direction is horizontal, and depth direction is vertical from backrest 1 towards the human body); using curve fitting, connect the key nodes on the right flexible rack 1-3-2 or flexible rack 1-3-4 to form a continuous three-dimensional curve to form two three-dimensional curves, and move one of the three-dimensional curves to the midline of the two three-dimensional curves to form the spinal curve; then, using this spinal curve as the midline, generate a symmetrical back contour curve based on the distribution difference of the left and right muscle groups (e.g., when the pressure of the left muscle group is greater than that of the right, the left curve is appropriately deflected to the left), and finally form a complete three-dimensional curve model that reflects the user's back shape.

[0118] Step 15: Convert the three-dimensional curve mathematical model into control parameters for massage module 1-3 to guide the deformation control of the right flexible rack 1-3-2 and left flexible rack 1-3-4. Specifically, this includes: based on the structural characteristics of the right flexible rack 1-3-2 and left flexible rack 1-3-4 (such as length and key deformable node positions), converting the shape of the left and right back contour curves in the three-dimensional model (such as the degree of curvature at each height position and protrusion depth) into the required deformation state of the right flexible rack 1-3-2 and left flexible rack 1-3-4 (such as how many millimeters to bend left / right at a certain height position), combined with the flexible material properties of the racks (such as elasticity). The system calculates the driving force required for each key node of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 to achieve the target deformation (provided by the micro-drive unit connected to the right flexible rack 1-3-2 and the left flexible rack 1-3-4) based on the resistance, withstandable deformation force, and support capacity of the rear support member 1-2. These driving forces are then converted into control signals recognizable by the electronic control box 6 (such as the working intensity and duration of the drive unit) and organized into a parameter table (containing the position of each node, the target deformation value, and the corresponding drive signal), which is stored in the electronic control box 6 as the direct basis for subsequent control of the deformation of the right flexible rack 1-3-2 and the left flexible rack 1-3-4.

[0119] Step 2: In conjunction with the electronic control box, based on the human back curve model, control the deformation of the right flexible rack 1-3-2 and left flexible rack 1-3-4 of the massage module 1-3 to adapt to the user's back curve. Specifically, the electronic control box 6 retrieves the control parameter table of the right flexible rack 1-3-2 and left flexible rack 1-3-4 stored in step 15, and sends instructions to the micro drive unit (servo motor 12 fixed to the upper crossbeam 1-3-1 and lower crossbeam 1-3-7) connected to the right flexible rack 1-3-2 and left flexible rack 1-3-4 according to the target deformation value and drive signal of each key node (such as the height of the chair back 1 at 8.5cm, 25.5cm, 42.5cm, etc.) in the table.

[0120] For each key node, the drive unit outputs a driving force of corresponding strength according to the instruction (e.g., when the waist node needs to bend by 8mm, the drive unit outputs a torque of 0.3N・m), pushing the right flexible rack 1-3-2 and the left flexible rack 1-3-4 to deform in the direction that conforms to the curve of the human back. If the model shows that the user's waist is protruding, the key nodes of the waist corresponding to the right flexible rack 1-3-2 and the left flexible rack 1-3-4 bend away from the back frame 1-1 (closer to the human body); if the neck is relatively flat, the key nodes of the neck corresponding to the right flexible rack 1-3-2 and the left flexible rack 1-3-4 maintain a small deformation.

[0121] During deformation, the right conductive strip 1-3-3 and the left conductive strip 1-3-5 bend synchronously with the rack (because they are fixed to the outside of the rack). At the same time, the rear support 1-2 (flexible / elastic material) deforms under the compression of the right flexible rack 1-3-2 and the left flexible rack 1-3-4, providing reverse support force for the right flexible rack 1-3-2 and the left flexible rack 1-3-4 (to prevent the right flexible rack 1-3-2 and the left flexible rack 1-3-4 from excessive deformation).

[0122] The electronic control box 6 monitors the deformation progress in real time through a miniature Hall displacement sensor (installed at key nodes of the right flexible rack 1-3-2 and the left flexible rack 1-3-4). When the error between the actual deformation value of the right flexible rack 1-3-2 and the left flexible rack 1-3-4 and the target value of the model is less than 1mm, the drive unit stops working and the adaptation is completed. At this time, the curve trajectory of the right and left flexible racks 1-3-4 completely coincides with the curve of the user's back, laying the trajectory foundation for the subsequent movement of the massage mechanism 1-3-6.

[0123] Step 3: Acquire user physiological state data and select massage mode based on the physiological state data. Specifically, this includes: collecting the user's real-time heart rate through a heart rate sensor (contact photoelectric sensor) integrated inside the left armrest 3 / right armrest 2; continuously monitoring the pressure changes of various muscle groups in the back through the pressure sensor array of the front support 1-4 (e.g., when the pressure on the lower back is continuously >150kPa, it is determined to be lower back muscle tension); and allowing the user to manually input their body state (e.g., neck and shoulder pain, lower back fatigue) through the hand controller 5.

[0124] Data analysis and pattern matching: Control box 6 analyzes the collected data and generates status labels.

[0125] If the heart rate is >80 beats / minute and the pressure distribution across the entire back is even (with no obvious high-pressure areas), it is determined to be a daily relaxation need, and the full back relaxation mode (covering from the tailbone to the neck, with moderate massage intensity) will be automatically recommended.

[0126] Mode Confirmation and Parameter Loading: The recommended mode option pops up on the display screen of the hand controller 5. After the user clicks to confirm, the electronic control box 6 loads the preset parameters corresponding to the mode (such as the massage mechanism 1-3-6 moving speed of 5mm / s and massage head 1-3-6-10 speed of 200rpm in the full back relaxation mode).

[0127] Step 4: Based on the selected massage mode and the human back curve model, control the massage mechanism 1-3-6 to move along the right flexible rack 1-3-2 and the left flexible rack 1-3-4, and simultaneously control the massage head 1-3-6-10 of the massage mechanism 1-3-6 to work. Specifically, the control box 6 sends a power supply command to the battery, and the battery supplies power to the elastic contact 1-3-6-13 of the massage mechanism 1-3-6 through the right conductive strip 1-3-3 and the left conductive strip 1-3-5. The current is transmitted to the dual-head motor 1-3-6-3.

[0128] Massage head 1-3-6-10 start-up: Dual-head motor 1-3-6-3 starts operating according to mode parameters, driving the two worm gears 1-3-6-4 to rotate. Worm gears 1-3-6-4 drive turbine 1-3-6-5 to rotate. The first gear 1-3-6-6 on the coaxial axis of turbine 1-3-6-5 meshes and drives the second gear 1-3-6-7. The second gear 1-3-6-7 then drives the third gear 1-3-6-8. Finally, the third gear 1-3-6-8 drives the massage head 1-3-6-10 to rotate clockwise in a gentle kneading manner through the rotating rod 1-3-6-9.

[0129] Massage mechanism 1-3-6 movement: When the third gear 1-3-6-8 rotates, the coaxial transmission gear 1-3-6-14 rotates synchronously, meshing and driving the follower gear 1-3-6-11, which in turn drives the walking gear 1-3-6-12 to rotate; the walking gear 1-3-6-12 meshes with the teeth of the right flexible rack 1-3-2 and the left flexible rack 1-3-4, and moves along the curved trajectory of the rack (determined by the curve model of the human back). In the full back relaxation mode, it moves from the storage position between the seat cushion 4 and the back frame 1-1 (near the lower crossbeam 1-3-7) to the neck (near the upper crossbeam 1-3-1), conforming to the curve of the back throughout the entire process;

[0130] Track calibration: Guide sleeve 1-3-6-2 (fitted on the outside of the rack) provides guidance for the massage mechanism 1-3-6 and the housing 1-3-6-11-3-6-1, preventing the mechanism from deviating from the track; at the same time, the electronic control box 6 obtains the position of the mechanism in real time through the miniature Hall displacement sensor on the rack. If it deviates from the model track (error > 2mm), the speed of the walking gear 1-3-6-12 is finely adjusted to ensure that the movement path is completely consistent with the back curve;

[0131] Step 5: During the movement of the massage mechanism 1-3-6, the movement speed and massage intensity of the massage mechanism 1-3-6 are dynamically adjusted according to the human back curve model and pressure distribution data. Specifically, this includes: the pressure sensor array of the front support 1-4 collects back pressure data once per second (focusing on monitoring easily fatigued areas such as the waist, neck, and shoulders); and the current sensor of the massage mechanism 1-3-6 (connected in series in the power supply circuit of the dual-head motor 1-3-6-3) monitors the motor load current in real time (the greater the load, the more tense the muscles contacted by the massage head 1-3-6-10).

[0132] Curve adaptation adjustment: If the user's sitting posture is slightly adjusted (such as leaning back), the pressure sensor detects a slight change in the back curve, and the electronic control box 6 finely adjusts the deformation of the right and left flexible racks 1-3-4 (by supplementing the driving force through the drive unit), while simultaneously adjusting the movement trajectory of the massage mechanism 1-3-6 to ensure that the massage head 1-3-6-10 always fits the back.

[0133] Step 6: After the massage is finished, control the massage mechanism 1-3-6 to return to the storage position during the non-massage period. Specifically, when the massage duration reaches the preset time of the mode (such as 15 minutes for the full back relaxation mode), or when the user clicks the stop button through the hand controller 5, the control box 6 sends an end command to the massage mechanism 1-3-6.

[0134] Massage head 1-3-6-10 stops rotating and the mechanism resets: The dual-head motor 1-3-6-3 stops running, and the massage head 1-3-6-10 stops working; at the same time, the electrical control box 6 controls the walking gear 1-3-6-12 to rotate in the opposite direction, driving the massage mechanism 1-3-6 to move along the right and left flexible racks 1-3-4 from the current position to the storage position between the seat cushion 4 and the back frame 1-1. During the movement, the elastic contact 1-3-6-13 remains in contact with the conductive strip (to ensure stable power supply), and the guide sleeve 1-3-6-2 continuously guides to prevent the mechanism from shifting.

[0135] Power cut-off and status recording: When the massage mechanism is fully returned to the stored position (the displacement sensor detects that the mechanism has reached below the lower crossbeam 1-3-7), the control box 6 cuts off the power supply from the battery to the conductive strip, and the elastic contact 1-3-6-13 stops conducting electricity; at the same time, the control box 6 automatically records the massage mode, duration, and intensity parameters and stores them in the built-in storage unit, which can be directly recalled when the user sits down next time.

[0136] Reset Confirmation: The display screen of the hand controller 5 pops up a message indicating that the massage has ended and the mechanism has been reset. At the same time, the rear support 1-2 and the right / left flexible toothed racks 1-3-4 slightly rebound under their own elasticity (returning to the initial fitting state), ready for the next use.

[0137] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A massage office chair, comprising a seat cushion, a backrest, and a massage mechanism, wherein an electrical control box is fixedly located beneath the seat cushion, the backrest includes a back frame fixed to one end of the seat cushion, a rear support member is fixed to the inner side of the back frame or integrally formed with the back frame, and a front support member is connected to the side of the back frame near the seat cushion, characterized in that, Also includes: The electronic control box acquires pressure distribution data on the user's back and generates a human back curve model based on the pressure distribution data. A massage module is provided between the front support member and the rear support member; The massage module is made of flexible material; The massage module includes a right flexible toothed bar and a left flexible toothed bar, which can deform according to the curve of the human back to adapt to different human body differences; The massage mechanism is movably connected to the massage module so that it runs along the curve of the human back during the massage period, while the human back does not feel any foreign object during the non-massage period. A miniature drive unit, connected to a right flexible rack and a left flexible rack, includes: The servo motor is fixed to the upper and lower crossbeams by bolts. The main gear is connected to the output shaft of the servo motor; The gear has two parts, which are rotatably connected to the upper and lower crossbeams respectively via bearings; The push rod is eccentrically hinged at one end to the driven gear, and connected at the other end to the key nodes of the right and left flexible racks via a ball joint; A miniature Hall displacement sensor is installed at the key node. The probe of the miniature Hall displacement sensor is aligned with the right and left flexible racks and electrically connected to the control box to provide real-time feedback on the deformation displacement of the right and left flexible racks. This allows the control box to control the deformation of the right and left flexible racks of the massage module according to the human back curve model, so as to adapt to the user's back curve.

2. The massage office chair according to claim 1, characterized in that, The back frame is the load-bearing frame of the chair back. The side of the back frame near the seat cushion is a curved structure that conforms to the human back, and the middle part is hollow or protruding away from the seat cushion to avoid interfering with the rear support. The front support is made of a flexible material to support the human back and adapt to the human body shape by deforming under force.

3. The massage office chair according to claim 2, characterized in that, The massage module also includes: The upper crossbeam is fixed to the inner wall of the back frame and is close to the upper end of the back frame; The lower crossbeam is fixed to the inner wall of the back frame, close to the lower end of the back frame, and away from the seat cushion; The upper ends of the right flexible rack and the left flexible rack are connected to the upper crossbeam, and the lower ends are connected to the lower crossbeam. There is a gap between the right flexible rack and the left flexible rack to allow the massage mechanism to move. The right and left conductive strips are connected at one end to the upper crossbeam and at the other end to the lower crossbeam, and are respectively connected to the outer side of the right flexible rack and the left flexible rack. The right flexible rack, left flexible rack, right conductive strip, and left conductive strip are flexible structural components that deform synchronously with the deformation of the front support component.

4. The massage office chair according to claim 3, characterized in that, The rear support is made of a flexible or elastic material so that it deforms along with the massage module and the front support and provides support to the massage module.

5. The massage office chair according to claim 3, characterized in that, The right flexible toothed rack, left flexible toothed rack, right conductive strip and left conductive strip have the same curved shape as the back frame. The adjacent surfaces of the right flexible toothed rack and left flexible toothed rack have tooth shape to engage with the massage mechanism, so that the massage mechanism can follow the tooth shape to move up and down to cover the massage area to the entire back of the human body.

6. The massage office chair according to claim 3, characterized in that, The side of the massage mechanism near the right and left conductive strips is electrically connected to an elastic contact. The elastic contact makes conductive contact with the right and left conductive strips to provide operating power to the massage mechanism.

7. The massage office chair according to claim 6, characterized in that, The back frame is connected to a left armrest and a right armrest on both sides respectively. A hand controller is fixed to one side of the seat cushion. The electrical control box is electrically connected to the hand controller, the right conductive strip and the left conductive strip. A leg rest is connected to the bottom of the seat cushion. A gas spring is rotatably connected to the middle of the bottom of the seat cushion. A five-star foot is connected to the end of the gas spring away from the seat cushion. Multiple casters are rotatably connected to the lower end of the five-star foot.

8. The massage office chair according to claim 7, characterized in that, The lower ends of the right and left flexible toothed racks extend away from the seat cushion and closer to the lower end of the back frame, so as to store the massage mechanism between the seat cushion and the back frame, avoiding the back area of ​​the human body, during non-massage periods. The electrical control box is equipped with a storage battery to work with the right and left conductive strips to prevent the wires from being pulled during the massage period; The massage mechanism includes: The housing is positioned between the left and right flexible racks; Guide sleeves are symmetrically fixed on both sides of the housing and fitted over the outer sides of the left and right flexible racks, the left conductive strip, and the right conductive strip; a dual-head motor is fixed inside the housing, located in the center, and electrically connected to the elastic contacts; a worm gear is fixed on both drive ends of the dual-head motor; a turbine is rotatably mounted inside the housing, symmetrically distributed, and meshes with the worm gear; a first gear is coaxially fixed on the turbine near the front support; a second gear is rotatably mounted inside the housing, symmetrically distributed, and meshes with the first gear; a third gear is rotatably mounted inside the housing, symmetrically distributed. The device consists of a cloth and a second gear; a rotating rod, which passes through the axis of the third gear and rotatably passes through the side of the housing near the front support; a massage head, fixed to one end of the rotating rod and located on the housing near the front support; a transmission gear, coaxially fixed to the side of the third gear away from the front support; a follower gear, rotatably disposed inside the housing and symmetrically distributed, and meshing with the transmission gear; and a traveling gear, coaxially fixed to the end face of the follower gear, movably passing through the housing, and located inside the guide sleeve, meshing with a flexible rack and a left flexible rack; and an elastic contact point located between the guide sleeve and the housing.

9. A control method for a massage office chair as described in any one of claims 1 to 8, characterized in that, The method includes: The electronic control box acquires pressure distribution data on the user's back and generates a human back curve model based on the pressure distribution data. The electric control box controls the deformation of the right and left flexible toothed racks of the massage module according to the curve model of the human back, so as to adapt to the curve of the user's back. The electronic control box acquires the user's physiological state data and selects a massage mode based on the physiological state data; Based on the selected massage mode and the human back curve model, the massage mechanism is controlled to move along the right flexible rack and the left flexible rack, while the massage head of the massage mechanism is controlled to work. During the movement of the massage mechanism, the movement speed and massage intensity are dynamically adjusted based on the human back curve model and pressure distribution data. After the massage ends, control the massage mechanism to return to its stored position during non-massage periods.

10. The control method for the massage office chair according to claim 9, characterized in that, The system acquires pressure distribution data on the user's back through an electronic control box and generates a human back curve model based on the pressure distribution data, including: By using miniature Hall displacement sensors located at key points, pressure distribution data is collected when the user's back comes into contact with the chair back. The collected pressure data is filtered and denoised to obtain an effective pressure distribution map of the user's back. Based on the effective pressure distribution map, identify the user's spinal alignment and back muscle group distribution characteristics; Based on the identified spinal alignment and muscle group distribution features, a three-dimensional curve mathematical model that conforms to the individual user's back shape is calculated and generated. The three-dimensional curve mathematical model is converted into control parameters for the massage module, which are used to guide the electrical control box in controlling the deformation of the right and left flexible racks.

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